Part 29

THE LANGUAGE OF COLOR

6 x 9, illustrated, 282 pages $2.00

A practical volume on color, the various fields in which it is used and its importance in portraying the ideas that make for progress. A book of special interest to all those who deal in color schemes and values.

THE BOOK OF THE SKY

6 x 9, illustrated, 236 pages $3.50

"The beauties, wonders, awesome spectacles, inspiring panoramas, and extensive ranges of vision which await the aerial traveler, make of cloudland a veritable fairyland if he will open his consciousness to them. Aircraft have brought this new world of experiences within easy reach of mankind and it is one of the aims of this volume to awaken those who fly, or would fly, to the variety of interest which air travel affords."

The Literature of Engineering and the Industries

¶ On our shelves is the most complete stock of engineering, scientific, technical and industrial books in the United States. A large number of these we publish and for an ever increasing number we are the sole agents.

¶ All inquiries are cheerfully and carefully answered and complete catalogs as well as special lists are sent free on request.

D. Van Nostrand Company PUBLISHERS AND BOOKSELLERS 8 WARREN STREET NEW YORK

Transcriber's Notes:

Passages in italics are indicated by italics.

Subscripted characters are indicated by {subscript}.

The following misprints have been corrected: "imgaes" corrected to "images" (page 128) "bove" corrected to "above" (page 177) "verticle" corrected to "vertical" (page 239) "colo" corrected to "color" (Index)

Other than the corrections listed above, inconsistencies in spelling and hyphenation have been retained from the original.

The inverted "8" and "S" characters at the top of page 45 cannot be properly represented in this text version.